NM CID ES-3 Practice Questions - New Mexico CID ES-3 Low Voltage Special Systems (Under 50 Volts) Examination Exam

Access More Questions

Why does the NEC treat a Class 2 circuit as providing acceptable electric-shock protection, while a Class 3 circuit requires additional safeguards?

Class 3 circuits are limited to 12 volts Class 2 sources are power-limited so they are considered safe from fire initiation and provide acceptable shock protection; Class 3 is power-limited for fire but allows higher voltage/current, so extra shock safeguards apply Class 2 may share a raceway with 480-volt feeders without a barrier Class 3 circuits are exempt from cable listing

Correct Answer:

Class 2 sources are power-limited so they are considered safe from fire initiation and provide acceptable shock protection; Class 3 is power-limited for fire but allows higher voltage/current, so extra shock safeguards apply

Access more questions from this quiz

Continue to NM CID ES-3 Practice Questions - New Mexico CID ES-3 Low Voltage Special Systems (Under 50 Volts) Examination Exam for more practice questions and the full quiz experience.

Access More Questions